import pytest
import requests
import json
from typing import Dict, Any, Optional
import time
from unittest.mock import patch
import requests_mock

# 配置信息（全部使用模拟值）
CONFIG = {
    "secret_id": "mock-secret-id",
    "secret_key": "mock-secret-key",
    "region": "ap-guangzhou",
    "api_url": "https://cvm.tencentcloudapi.com/",
}


def generate_signature(params: Dict[str, Any]) -> str:
    """生成API请求签名（模拟实现）"""
    return "mock-signature"


def create_placement_group(
        placement_group_name: str = "test-group",
        strategy: str = "HOST",
        max_num_per_host: Optional[int] = None,
        project_id: Optional[int] = None,
        tags: Optional[list] = None
) -> Dict[str, Any]:
    """创建分散置放群组"""
    params = {
        "Action": "CreatePlacementGroup",
        "Version": "2017-03-12",
        "Region": CONFIG["region"],
        "PlacementGroupName": placement_group_name,
        "Strategy": strategy,
        "SecretId": CONFIG["secret_id"],
        "Timestamp": int(time.time()),
        "Nonce": int(time.time() * 1000),
    }

    if max_num_per_host is not None:
        params["MaxNumPerHost"] = max_num_per_host

    if project_id is not None:
        params["ProjectId"] = project_id

    if tags:
        for i, tag in enumerate(tags):
            params[f"Tags.{i}.Key"] = tag["Key"]
            params[f"Tags.{i}.Value"] = tag["Value"]

    params["Signature"] = generate_signature(params)
    response = requests.post(CONFIG["api_url"], data=params)
    return response.json()


# 测试用例
class TestTencentCloudCreatePlacementGroup:
    @pytest.fixture
    def mock_request(self):
        with requests_mock.Mocker() as m:
            yield m

    def test_success(self, mock_request):
        """测试成功创建分散置放群组"""
        mock_response = {
            "Response": {
                "PlacementGroupId": "pg-test-123456",
                "RequestId": "mock-request-id"
            }
        }

        mock_request.post(CONFIG["api_url"], json=mock_response)

        result = create_placement_group()
        assert "Response" in result
        assert "Error" not in result["Response"]
        assert "PlacementGroupId" in result["Response"]

    def test_invalid_strategy(self, mock_request):
        """测试无效策略"""
        mock_response = {
            "Response": {
                "Error": {
                    "Code": "InvalidParameterValue.StrategyInvalid",
                    "Message": "The specified strategy is invalid."
                },
                "RequestId": "mock-request-id"
            }
        }

        mock_request.post(CONFIG["api_url"], json=mock_response)

        result = create_placement_group(strategy="INVALID_STRATEGY")
        assert "Response" in result
        assert "Error" in result["Response"]
        assert result["Response"]["Error"]["Code"] == "InvalidParameterValue.StrategyInvalid"

    def test_missing_required_parameter(self, mock_request, create_placement_group=None):
        """测试缺少必要参数"""
        mock_response = {
            "Response": {
                "Error": {
                    "Code": "InvalidParameter",
                    "Message": "A required parameter is missing."
                },
                "RequestId": "mock-request-id"
            }
        }

        # 修改函数内部行为，移除必要参数
        original_function = create_placement_group

        def mock_function(*args, **kwargs):
            params = {
                "Action": "CreatePlacementGroup",
                "Version": "2017-03-12",
                "Region": CONFIG["region"],
                # 缺少PlacementGroupName参数
                "Strategy": "HOST",
                "SecretId": CONFIG["secret_id"],
                "Timestamp": int(time.time()),
                "Nonce": int(time.time() * 1000),
            }
            params["Signature"] = generate_signature(params)
            response = requests.post(CONFIG["api_url"], data=params)
            return response.json()

        create_placement_group = mock_function

        try:
            mock_request.post(CONFIG["api_url"], json=mock_response)
            result = create_placement_group()
            assert "Response" in result
            assert "Error" in result["Response"]
            assert result["Response"]["Error"]["Code"] == "InvalidParameter"
        finally:
            create_placement_group = original_function

    def test_duplicate_group_name(self, mock_request):
        """测试重复的群组名称"""
        mock_response = {
            "Response": {
                "Error": {
                    "Code": "InvalidPlacementGroup.NameDuplicate",
                    "Message": "The specified placement group name already exists."
                },
                "RequestId": "mock-request-id"
            }
        }

        mock_request.post(CONFIG["api_url"], json=mock_response)

        result = create_placement_group(placement_group_name="existing-group")
        assert "Response" in result
        assert "Error" in result["Response"]
        assert result["Response"]["Error"]["Code"] == "InvalidPlacementGroup.NameDuplicate"

    def test_exceed_quota(self, mock_request):
        """测试超出配额限制"""
        mock_response = {
            "Response": {
                "Error": {
                    "Code": "QuotaExceeded.PlacementGroup",
                    "Message": "You have reached the limit on the number of placement groups you can create."
                },
                "RequestId": "mock-request-id"
            }
        }

        mock_request.post(CONFIG["api_url"], json=mock_response)

        result = create_placement_group()
        assert "Response" in result
        assert "Error" in result["Response"]
        assert result["Response"]["Error"]["Code"] == "QuotaExceeded.PlacementGroup"

    def test_invalid_project_id(self, mock_request):
        """测试无效的项目ID"""
        mock_response = {
            "Response": {
                "Error": {
                    "Code": "InvalidProjectId.NotFound",
                    "Message": "The specified project ID does not exist."
                },
                "RequestId": "mock-request-id"
            }
        }

        mock_request.post(CONFIG["api_url"], json=mock_response)

        result = create_placement_group(project_id=999999)
        assert "Response" in result
        assert "Error" in result["Response"]
        assert result["Response"]["Error"]["Code"] == "InvalidProjectId.NotFound"

    def test_invalid_max_num_per_host(self, mock_request):
        """测试无效的MaxNumPerHost值"""
        mock_response = {
            "Response": {
                "Error": {
                    "Code": "InvalidParameterValue.MaxNumPerHostInvalid",
                    "Message": "The specified MaxNumPerHost is invalid."
                },
                "RequestId": "mock-request-id"
            }
        }

        mock_request.post(CONFIG["api_url"], json=mock_response)

        result = create_placement_group(max_num_per_host=-1)
        assert "Response" in result
        assert "Error" in result["Response"]
        assert result["Response"]["Error"]["Code"] == "InvalidParameterValue.MaxNumPerHostInvalid"

    def test_invalid_tag_key(self, mock_request):
        """测试无效的标签键"""
        mock_response = {
            "Response": {
                "Error": {
                    "Code": "InvalidTagKey",
                    "Message": "The specified TagKey is invalid."
                },
                "RequestId": "mock-request-id"
            }
        }

        mock_request.post(CONFIG["api_url"], json=mock_response)

        result = create_placement_group(tags=[{"Key": "invalid-key*", "Value": "value"}])
        assert "Response" in result
        assert "Error" in result["Response"]
        assert result["Response"]["Error"]["Code"] == "InvalidTagKey"

    def test_invalid_tag_value(self, mock_request):
        """测试无效的标签值"""
        mock_response = {
            "Response": {
                "Error": {
                    "Code": "InvalidTagValue",
                    "Message": "The specified TagValue is invalid."
                },
                "RequestId": "mock-request-id"
            }
        }

        mock_request.post(CONFIG["api_url"], json=mock_response)

        result = create_placement_group(tags=[{"Key": "key", "Value": "invalid-value*"}])
        assert "Response" in result
        assert "Error" in result["Response"]
        assert result["Response"]["Error"]["Code"] == "InvalidTagValue"

    def test_exceed_tag_limit(self, mock_request):
        """测试超出标签数量限制"""
        mock_response = {
            "Response": {
                "Error": {
                    "Code": "TagLimitExceeded",
                    "Message": "You have exceeded the number of tags allowed per resource."
                },
                "RequestId": "mock-request-id"
            }
        }

        # 创建超过限制数量的标签
        tags = [{"Key": f"key{i}", "Value": "value"} for i in range(11)]  # 假设限制为10个

        mock_request.post(CONFIG["api_url"], json=mock_response)

        result = create_placement_group(tags=tags)
        assert "Response" in result
        assert "Error" in result["Response"]
        assert result["Response"]["Error"]["Code"] == "TagLimitExceeded"

    def test_insufficient_permissions(self, mock_request):
        """测试权限不足"""
        mock_response = {
            "Response": {
                "Error": {
                    "Code": "AuthFailure.UnauthorizedOperation",
                    "Message": "You are not authorized to perform this operation."
                },
                "RequestId": "mock-request-id"
            }
        }

        original_secret_id = CONFIG["secret_id"]
        CONFIG["secret_id"] = "invalid-secret-id"

        try:
            mock_request.post(CONFIG["api_url"], json=mock_response)
            result = create_placement_group()
            assert "Response" in result
            assert "Error" in result["Response"]
            assert result["Response"]["Error"]["Code"] == "AuthFailure.UnauthorizedOperation"
        finally:
            CONFIG["secret_id"] = original_secret_id


def run_tests():
    """启动测试的函数"""
    # 打印配置信息用于调试
    print("测试配置信息:")
    for key, value in CONFIG.items():
        print(f"{key}: {value if key != 'secret_key' else '****'}")

    # 运行所有测试
    pytest.main([__file__, "-v"])


if __name__ == "__main__":
    run_tests()    